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artinya ukuran panjang = 10x
ukuran lebar = 5x
ukuran tinggi = 4x
Jumlah panjang rusuk = 228
4 ( p + l + t) = 228
4 ( 10x + 5x + 4x) = 228
4 . 19x = 228
38x = 228
x = 228 / 38
x = 6
Maka: panjang = 10x = 10 . 6 = 60 cm
lebar = 5x = 5 . 6 = 30 cm
tinggi = 4x = 4 . 6 = 24 cm